Manuals and User Guides for Keston C C55P. We have 1 Keston C C55P manual available for free PDF download: Installation And Servicing Instructions. Keston C55 Pdf User Manuals. View online or download Keston C55 Installation And Servicing Instructions, User Instructions. WD The Keston C45, C40P, C55 & C55P CONTENTS Section Description 0 HANDLING INSTRUCTIONS List of contents Recommended handling.

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Check pump direction on boiler and any external pumps.

Flow thermistor not connected or faulty. No ignition after restart. Further distance it is pipe size should be greater.

Troubleshooting Manual | Keston Boilers Guide

Flow overheat — check water circulation. This is a spare sensor connection. If thermal cut off switches have operated press in the red button. After clearing the issue, you will kkeston to reset boiler press reset buttonso that boiler resumes operation. All additional components are packed inside the boiler cabinet itself. Air Intake Connection E28 Fan not rotating — check fan connection and fan for fault. Check the system pump performance and the system for blockages.


Boiler is alight and running in response to a demand from central heating i. Check gas supply, gas valve operation and ignitor electrode spark generation.

Boiler off on front.

Flues for gas appliances of rated input not exceeding 70kW BS Reset button on a Combi boiler The most common block codes are included in the table below: Burner is off because the boiler is up to temperature.

Open the catalog to page 3. Those boilers have a heat exchanger from stainless steel, lowest in class NOx emission class 5thanks to both boilres are designto provide super efficiency at condensing mode, giving smallest possible cabinet than can be safely hang on the wall.

Ensure that the boiler has electrical supply correct to V. Thermal fuse blown or flue overheat thermostat activated.

Flow temperature exceed 95o C. Check by-pass fitted on off flashing Cabinet overheat.


All joints should be checked for soundness after servicing and before firing the appliance. Open the catalog to page 4. Possible fan disconnected or faulty.

Since the units use standard 50 mm muPVC pipe for the flue and air intake systems the boiler is packed in a single box without additional flue kit. Power has been reset whilst boiler was in lockout. Flue temperatures above 75C may cause reduced boiler output. Ensure the boiler has an inlet gas pressure of 20 mbar at the gas valve.


The boiler will shut down if the water pressure drops below 0. The boiler has tried five times to fire and has not suceeded. Check pump and fan run-on working OK when controls shut blr down.

Check boiler for leaks. Fan failure — boiler cannot detect fan rotation. Open the catalog to page 2. Flame circuit error — possible control box fault. Check fan, connections and fan pcb. Outside temperature — display indicates a small graph on the bottom row. Code Meaning E00 Flame detected when not expected.

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